Jaap Nienhuis is a civil engineer and earth scientist, focused on understanding river deltas and barrier islands. He got his BSc and MSc degree in Civil Engineering from Twente University, the Netherlands. After completing his degrees Jaap moved to the USA and obtained his PhD degree from MIT and WHOI working on wave-driven coastal sediment transport and coastal change. Following postdoctoral research on the Mississippi River Delta at Tulane University in New Orleans, Jaap Nienhuis started a faculty position at Florida State University in Tallahassee, Florida. In 2019, he joined Utrecht University. His latest work involves building simplified numerical models of river delta and barrier island change, on timescales of 10-1000 years, to understand past changes and project their future dynamics as a result of wave, tidal, fluvial processes, and sea-level rise.